diff --git a/src/rootserver/backup/ob_backup_task_scheduler.cpp b/src/rootserver/backup/ob_backup_task_scheduler.cpp
index 05d097d2f..127c2b805 100644
--- a/src/rootserver/backup/ob_backup_task_scheduler.cpp
+++ b/src/rootserver/backup/ob_backup_task_scheduler.cpp
@@ -1335,8 +1335,17 @@ int ObBackupTaskScheduler::check_alive_(int64_t &last_check_task_on_server_ts, b
   Bool res = false;
   bool force_update = false;
   const int64_t now = ObTimeUtility::current_time();
-  const int64_t backup_task_keep_alive_interval = GCONF._backup_task_keep_alive_interval;
-  const int64_t backup_task_keep_alive_timeout = GCONF._backup_task_keep_alive_timeout;
+  int64_t backup_task_keep_alive_interval = 0;
+  int64_t backup_task_keep_alive_timeout = 0;
+  omt::ObTenantConfigGuard tenant_config(TENANT_CONF(MTL_ID()));
+  if (!tenant_config.is_valid()) {
+    backup_task_keep_alive_interval = 10_s;
+    backup_task_keep_alive_timeout = 10_min;
+  } else {
+    backup_task_keep_alive_interval = tenant_config->_backup_task_keep_alive_interval;
+    backup_task_keep_alive_timeout = tenant_config->_backup_task_keep_alive_timeout;
+  }
+
   if ((now <= backup_task_keep_alive_interval + last_check_task_on_server_ts) && !reload_flag) {
   } else if (OB_FAIL(queue_.get_schedule_tasks(schedule_tasks, allocator))) {
     LOG_WARN("get scheduelr tasks error", K(ret));
diff --git a/src/share/backup/ob_backup_struct.h b/src/share/backup/ob_backup_struct.h
index bacd8933b..2c28f46b6 100644
--- a/src/share/backup/ob_backup_struct.h
+++ b/src/share/backup/ob_backup_struct.h
@@ -107,6 +107,7 @@ static constexpr const int64_t FAKE_MAX_FILE_ID = MAX_FAKE_PROVIDE_ITEM_COUNT /
 static constexpr const int64_t OB_COMMENT_LENGTH = 1024;
 
 static constexpr const int64_t DEFAULT_ARCHIVE_FILE_SIZE = 64 << 20; // 64MB
+static constexpr const int64_t DEFAULT_BACKUP_DATA_FILE_SIZE = 4 * 1024LL * 1024LL * 1024LL; // 4GB
 
 //add by physical backup and restore
 const char *const OB_STR_INCARNATION = "incarnation";
diff --git a/src/share/parameter/ob_parameter_seed.ipp b/src/share/parameter/ob_parameter_seed.ipp
index a28c2f7dc..a423b582f 100755
--- a/src/share/parameter/ob_parameter_seed.ipp
+++ b/src/share/parameter/ob_parameter_seed.ipp
@@ -1126,17 +1126,17 @@ DEF_TIME(_ob_ddl_timeout, OB_CLUSTER_PARAMETER, "1000s", "[1s,)",
          ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 
 // backup 备份恢复相关的配置
-DEF_CAP(backup_data_file_size, OB_CLUSTER_PARAMETER, "4G", "[512M,4G]",
+DEF_CAP(backup_data_file_size, OB_TENANT_PARAMETER, "4G", "[512M,4G]",
         "backup data file size. "
         "Range: [512M, 4G] in integer",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 
-DEF_TIME(_backup_task_keep_alive_interval, OB_CLUSTER_PARAMETER, "10s", "[1s,)",
+DEF_TIME(_backup_task_keep_alive_interval, OB_TENANT_PARAMETER, "10s", "[1s,)",
          "control backup task keep alive interval"
          "Range: [1s, +∞)",
          ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 
-DEF_TIME(_backup_task_keep_alive_timeout, OB_CLUSTER_PARAMETER, "10m", "[1s,)",
+DEF_TIME(_backup_task_keep_alive_timeout, OB_TENANT_PARAMETER, "10m", "[1s,)",
          "control backup task keep alive timeout"
          "Range: [1s, +∞)",
          ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
diff --git a/src/storage/backup/ob_backup_ctx.h b/src/storage/backup/ob_backup_ctx.h
index bc9c4893b..cd8ab4b8a 100644
--- a/src/storage/backup/ob_backup_ctx.h
+++ b/src/storage/backup/ob_backup_ctx.h
@@ -148,7 +148,12 @@ public:
 private:
   int64_t get_data_file_size() const
   {
-    return GCONF.backup_data_file_size;
+    omt::ObTenantConfigGuard tenant_config(TENANT_CONF(MTL_ID()));
+    if (!tenant_config.is_valid()) {
+      return share::DEFAULT_BACKUP_DATA_FILE_SIZE;
+    } else {
+      return tenant_config->backup_data_file_size;
+    }
   }
   int open_file_writer_(const share::ObBackupPath &backup_path);
   int prepare_file_write_ctx_(
diff --git a/src/storage/backup/ob_backup_extern_info_mgr.h b/src/storage/backup/ob_backup_extern_info_mgr.h
index 76b9b1da3..c6fe56384 100644
--- a/src/storage/backup/ob_backup_extern_info_mgr.h
+++ b/src/storage/backup/ob_backup_extern_info_mgr.h
@@ -100,7 +100,14 @@ public:
 private:
   int write_meta_data_(const blocksstable::ObBufferReader &meta_data, const common::ObTabletID &tablet_id);
   int prepare_backup_file_(const int64_t file_id);
-  int64_t get_data_file_size() const { return GCONF.backup_data_file_size; }
+  int64_t get_data_file_size() const {
+    omt::ObTenantConfigGuard tenant_config(TENANT_CONF(MTL_ID()));
+    if (!tenant_config.is_valid()) {
+      return DEFAULT_BACKUP_DATA_FILE_SIZE;
+    } else {
+      return tenant_config->backup_data_file_size;
+    }
+  }
   bool need_switch_file_(const blocksstable::ObBufferReader &buffer);
   int switch_file_();
   int flush_trailer_();
diff --git a/src/storage/backup/ob_backup_task.cpp b/src/storage/backup/ob_backup_task.cpp
index 034b6c212..20259efa0 100644
--- a/src/storage/backup/ob_backup_task.cpp
+++ b/src/storage/backup/ob_backup_task.cpp
@@ -744,7 +744,13 @@ int ObLSBackupDataDagNet::fill_dag_net_key(char *buf, const int64_t buf_len) con
 int ObLSBackupDataDagNet::get_batch_size_(int64_t &batch_size)
 {
   int ret = OB_SUCCESS;
-  const int64_t data_file_size = GCONF.backup_data_file_size;
+  int64_t data_file_size = 0;
+  omt::ObTenantConfigGuard tenant_config(TENANT_CONF(MTL_ID()));
+  if (!tenant_config.is_valid()) {
+    data_file_size = DEFAULT_BACKUP_DATA_FILE_SIZE;
+   } else {
+    data_file_size = tenant_config->backup_data_file_size;
+  }
   if (0 == data_file_size) {
     batch_size = OB_DEFAULT_BACKUP_BATCH_COUNT;
   } else {